METHOD FOR CALCULATING COIL DIAMETER

• Main Authors: KANEDA MASASHI, YASUMI TADAAKI, YOSHIMURA MOTOHIRO
• Format: Patent
• Language: English
• Published: 04.04.1997
• Edition: 6
• Subjects: AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL; CONVEYING; HANDLING THIN OR FILAMENTARY MATERIAL; HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS,CABLES; MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING; MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; PACKING; PERFORMING OPERATIONS; PHYSICS; PUNCHING METAL; STORING; TESTING; TRANSPORTING

PROBLEM TO BE SOLVED: To provide a method capable of accurately calculating the diameter of a coil remaining on a pay-off reel, even on a line having a free loop. SOLUTION: When a calculated value D of a coil diameter is greater than the previous value DA-1 , and when it is much smaller than the value, an appropriate correction DH is not set to a value D calculated from the rotating speed N of a pay-off reel and the rotating speed V of a pinch roll but to the current value DA of the coil diameter (S5). The correction DH is calculated from a theoretical value Uα of the speed at which the coil is decreased, the sampling time (t) of arithmetic processing, and the previous value DA-1 of the coil diameter, irrespective of the rotating speed N of the pay-off reel.